Oiling system for cam engines



Aug. 10 192$. 1,595,976

H. QAMINEZ 01mm SYSTEM FOR cm wax-mas Filed Nov. 16.1825 2 Sheets-Sheet '1 mvzmok Harald Cam Inez ATTORNEY Aug. 10 1926.

H CAMINEZ OILING SYSTEM FOR CAM ENGINES Filed New. 16, 1925 2 SheetsSheet 2 mATTORNEY Patented 1 Aug. 1t 1926.

UNITED STATES HAROLD CAMINEZ, OF DAYTON, OHIO.-

OILING SYSTEM FOR CAM ENGINES.

Application filed-November f6, 1925. Serial No. 89,487.

This invention relates to internal coin bastion engines of that t pc in which the pistons are interconnecte by linkage system and are constrained tooperate against the'cam which is provided onacentral shaft. The primary object of the invention 1s the provision of a novel oilin systemfor an engine of this character an embraces means cessed pocket for the supply of oil from a reservoir with-. in the centralshaft to the connection between the links and the pistons. The oil is supplied to these connections when the pistons are at the inner ends of their strokes and closest to the center shaft. It is a further object of the invention to ,provide oil nozzles extending from the cenitral shaft to points close to the ends of the links which interconnect the pistons, in such a manner that the oil is received in a rerovided at the joint between the links and t e pistons.

A further object is the provision of means for periodically causing a supply of oil to be forced through the nozzles by periodically connecting the interior of the shaft with an engine driven oil pump. The oil is .thus supplied through the nozzles and also through conduits extending to the periphery of the cam at predetermined points in the cycle of operation.

A further objectis the provision of, an

inner extension on the oil nozzles which communicate with a central part of the reservoir, provided in the shaft in such a manner that the oil is strained through a number of small holes at the inner end of the nozzle. Further objects will be more fully set forth in the following description, the

claims and in the drawin s, of which Fig. 1 is a central section taken through "the engine.

'1 Fig. 2 is a section on the line 2-2 of Fig. 1.

-' Fig. 3 is a section on the line 3-3 of Fig. 1. n

Fig. 4 is a section on the line H of Fig. 5.

Fig. 5 is a detailed view of an equalizing member which interconnects the pistons, and Fig. 6 is an enlarged central section,- taken the links and through the shaft.

Referring more particularly to the drawings'by reference numerals, 10 indicates the main casting or housing in which are proternal combustion engine of the stationary type. The pistons 12 operating in their respective cylinders are provided with ballbearings'13 suitably mounted upon piston pins 14 which are revolubly mounted in the side walls and in the interior Walls 15 of the piston. The rollers 13 bear upon a double lobed cam 16 which is provided with high portions 17 and low portions 18. This cam is fixed-,upon a main central shaft 19 which is mounted by ball-bearings 20 and 21 at opposite ends of the main housing or casting 10. Fixed to each piston pin 14 is a pair of short link or stress equalizing members 22 and 23 shown n Figs. 4 and 5. These members are attached to the links 24 by pins 25 in such a manner that the links are free to move about the axis of the pins 25. The interconnection between the pistons by means of these links 24 and the equalizing members 22 and 23,-restrains the ball bearings- 13 so that they bear upon the cam 16 at all times, and it will be understood that the rotation, of the shaft 19 is caused by the pressure exerted upon the cam by the rollers as the charges within the cylinders are exploded in'the customary manner, The members 22 and 23 equalize the tension in the links and prevent side pressure of the pistons in the cylinders. The links are provided in sets, one set being located on each side of the cam and all of the-links in a set are situated in a plane parallel to the cam.

Fixed upon the shaft 19 is a gear 25' which meshes with a gear 26 on a shaft 27. Shaft 27 drives a gear pump 28 by means of which oil is supplied through a passage 29 to a space 30 provided in the casting 11 as indicated in Fig. 3. A suitable strainer may be provided within this space 30, and aso that they will periodically register with the passage 32 as the shaft rotates'i A supply of oil will thus be delivered periodically to the. reservoir or chamber 34 provided in the interior of the central shaft 19.

Extending from the shaft 19 are four oil .39 provided between nozzles 35, (see Fig. 6). These nozzles are provided with acentral passage 36 of acomparatively large size, and a restricted concentrating outlet 37 is provided at the outer end of these nozzles. The inner end of the nozzles extends to a central portion of the chamber 34L so that oil may be supplied to the nozzles from a central portion of the chamber through a series of small openings 38 in the inner end of the nozzle. These nozzles extend outwardly on opposite sides of the cam and on opposite sides cf the shaft so that they lie in the same planes as the two sets of links. The nozzles are provided'at such points in the shaft so they are close to the low portions 18 of the cam and they are of such length that the outlets 37 are close to the pockets or recesses the two opposite portions 40 and 41 of the equalizing member 22 and the two links to which they are attached. A cut-away portion 42 in the inner sides of the portions 40 and il enlarges the opening into this recess or pocket 39 and permits the oil to be supplied to the pins 25. The inner ends of the pockets 39 connect by means of'a passage &3 with the inside of the piston pin i l from which the oil may find its way through a central hole in the piston pin 14:, to oil the inner member of the ball-bean ing 13. The openings 37 of the nozzles are located so that they will be closest to the pockets 39 in the various equalizing members 22 and 23, when these pockets and the pistons to which members 22 and 23 are connected, are at the inner ends of their strokes and closest to the shaft 19. The holes are so located that the space 30 will be in communication with the chamber 3% within the shaft, ata time when the nozzles are located adjacent to the pockets 39. The pockets 39 will thus be filled with oil periodically and oil supplied to the pins In order to supply oil to the periphery of the cam, a series of passages 44 are provided through the cam and through the shaft. These passages preferably extend to points between the high and low portions of the cam. The passages 44: are constructed so that the oil flows comparatively slowly through them and the ends of the passages are slightly enlarged as indicated at 47 so that the oil is supplied in a suitable manner to reduce the friction between the ball-bearings l3 and the cam.

The end of the shaft is closed by a plug l6 which is removably attached by means of screw threads so that access may he had within the chamber 3% to clean it.

i am aware that various changes and modifications may be made within the scope of my invcntion and I do not intend to be limited to the precise form which has been chosen herewith for purposes of illustration.

1 claim:

1. In a cam one" a hollow central shat: a cam thereon hating a high portion and a low portion, a numberofcylinders arranged radially about said shaft, pistons adapted to reciprocate in said cylinders and having a bearing relation to the cam, a series of links interconnecting the pistons for maintaining the pistons in bearing relation to the cam, means for supplying oil to the interior of said shaft, said shaft having an aperture extending radially in the plane of the series of links and located adjacent, a low portion of the cam to supply oil to parts adjacent the ends of the links.

2. In a cam engine, a hollow central shaft, a cam thereon having a high portion and a low portion, a number of cylinders arranged radially about said shaft, pistons adapted to reciprocate in said cylinders and having a bearing relation to the cam, a series 0 links interconnecting the pistons for maintaining the pistons in bearing relation to the cam, means for periodically supplying oil to the interior ofthe shaft when one of said pistons is at the inner end of its stroke, said shaft having an aperture in the plane of the series of links and located adjacent a. low portion of the cam to supply oil periodically to parts adjacent the ends of the links when the said parts are close to the shaft.

3. In a cam engine, a a cam thereon having a high portion and a low portion, a. number of cylinders arranged radially about said shaft, pistons adapted to reciprocate in said cylinders and having a hearing relation to the cam, a series of links interconnecting the pistons for maintaining the pistons in hearing relation to the cam, means for supplying oil to ,the interior of said shaft, a nozzle extending from said shaftadjacent the low portion of the cam and communicating with the interior of the shaft for the supply of oil to the points of attachment between the links and the pistons.

l. In a cam engine, in combination. a hollow central shaft, a double lobed cam thereon, a plurality of cylinders arranged evenly radially about said cam, a plurality of pistons adapted to reciprocate in said cylinders, a roller for each piston bearing on said cam, a series of links arranged in a plane parallel to the cam and a short distance therefrom to interconnect the pistons to maintain the rollers in bearing relation to the cam, an oil reservoir in the inl'crior' of said shaft. a pair of nozzles in the plane of the links comniuniiating with the said reservoir and extending outwardly from said shaft to points close to the points of attachment of the links to opposite pistons with the pistons at the inner ends of their strokes, for the purpose described.

in a cam engine, in combination, a hollow central shaft, a double lobed cam thereon, a plurality of cylinders arranged hollow central shaft,

evenly radially about said cam, a plurality of pistons adapted to reciprocate in'said cylinders, a rolleyfor each piston bearing on said. cam, ELSBIIES of links arranged in a plane parallel to the cam and a short disseries of links, the nozzles extending within said passage and being in communication with central portions of said passage and extending outwardly from said shaft to points close to the points of attachment-of the links to opposite pistons when. the said pistons are at the inner ends of their strokes.

6. In a cam engine, the combination as set forth in claim 4% together with a pump for supplying oil under pressure to said reservoir, said shaft having a series of holes therein communicating with saidreservoir and spaced about said shaft so as to be successively placed in' communication with said pump, to cause a periodical discharge of oil from the nozzles when the pistons are closest to the nozzles.

7. In a cam engine, a hollow central shaft, a cam thereon having a high portion and a low portion, a number of cylinders arranged radially about said shaft, pistons adapted to reciprocate in said cylinders and having a bearing relation to the cam, a series of links interconnecting the pistons for maintaining the pistons in bearing relation to the cam, means for supplying oil to the interior of said shaft, a nozzle eX- tending from a central portion of the hollow shaft outwardly to a aointadjacent the lbw portion of the cam or the supply of oil to the parts adjacent the ends of the links when a piston is at the inner end of its stroke, said nozzle having a comparatively large passage therethrough,,a comparatively small restricted opening at the exit end thereof and an oil straining foraminated inlet at the inner end thereof.

8. In a cam engine in combination, a, hollow shaft, a cam thereon having a high and a low portion, a number of cylinders arranged about said shaft, pistons adapted to reciprocate in said cylinders, a short link member oscillatably mounted on each piston, a series of links oscillatatably attached at their ends to said members to interconnect the pistons and maintain them in bearing relation to the cam, means for supplying oil to the interior of said shaft, and a conduit from the interior of the shaft to a point close to the said members when the said members are closest to the shaft so that the oil may be supplied from. the shaft to the joints between the links and the members. i

9. In a cam engine, in combination, a central shaft, a double lobed cam thereon, four cylinders arranged radially about said. cam; pistons in said cylinders, antifriction rollers on the pistons engageable with the earn, a

short link member oscillatably mounted on each piston, a series of links all lying in a single plane to one side of said cam, a second series of links in a second plane on the opposite side of the cam, said links being attached at their endsto said members to maintain said rollers in bearing relation to' the cam, an oil reservior, nozzles communicating with said reseryoir and located in the planes of the links, said nozzles extending to points adjacent the joint between a member and the links attached thereto when said member is at a predetermined point. in the stroke of its piston, so that oil may be supplied to said I joint for the purpose described.

10. In a cam engine, in combinationfa" shaft, a cam thereon having a high and a low portion, a number of cylinders arranged about said shaft, pistons adapted to reciprocate in said cylinders, a short .link member oscillatably mounted on each piston, a series of links all in a single plane oscillatably attached at their ends to said members to interconnect the pistons and maintain them in bearing relation to the cam, said members and a pair of links attached thereto providing a recessedspace therebetween, an engine driven oil pump, a series ofynozzles in communication with said pump, said nozzles being located at points adjacent the said recessed space when said members are at their innermost position for the supply 9f a stream of oil thereto.

11. In a cam engine, in combination, a hollow shaft, a double lobed cam thereon, a plurality of opposing pairs of cylinders radially arranged about said cam, pistonsadapted to reciprocate in said cylinders, a piston pin for'each piston, a member oscillatably mounted in relation to each piston on each piston pin, a series of links oscillatebly mounted at their ends to said members to interconnect adjacent pistons together and maintain said pistons in bearing relation to the cam, all the links of said series lying in the same plane to one side of the cam, a second series of links in a second plane on the opposite side of said cam and connected to the said members, each of said members and a pair of links attached thereto providing a recess therebetween which has an opening directed toward the shaft, an engine driven dia'lly arranged to points adjacent said recesses when said members are at their innermost positions for. the supply of a stream of oil thereto.

12. In a cam engine, in combination, a hollow shaft, a double lobed cam thereon, a plurality of opposing pairs of cylinders raabout said cam, pistons adapted to reciprocate in said cylinders, a piston pin for each piston, a member oscillatably mounted in rclation to each piston on each piston pin, a series of links oscillatably mounted at their ends to said members to interconnect adjacent pistons to gether and maintain said pistons in bearing relation to the cam, all the links of said series lying in the same plane to one side of the cam, a second series of links in a second plane on the opposite side of said'cam and connected to the,said 'niembers, said members and a pair of links attached thereto providing a recess therebetween, an oil passage within said hollow shaft, 21 series of: nozzles in each of said planes extending away from the shaft and communicating at their inner ends with said passage, the nozzles being situated adjacent the low portions of the cam and extending to points adjacent the said recesses when said members are at their innermost positions, an oil pump, said shaft having a series of radial openings therein communicating with said passage and periodically communicating successively with said pump to supply oil only at predetermined parts in the cycle from said nozzles.

13. In an engine as set forth in claim 11, said members having oil passages therein from said recesses to the piston pins.

14. In a cam engine as setforth in claim 1, and means for supplying oil from the interior of the shaft to the operating face of the cam. v

15. In a cam engine, the combination as set forth in claim 4, and a series of passages extending through said cam to supply oil from said reservoir to the peripiieryv of the cam at points between the high and low sides of the cam.

In testimony whereof I have hereunto set my hand this 13th day of November, 1925.

HAROLD CAMINEZ. 

